Child safety seat



FIG. 1 is a top, front, right side perspective view of a child safety seat showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right view thereof; and,

FIG. 6 is a top view thereof. 

CLAIM I claim the ornamental design for a child safety seat, as shown and described. 